Suzuki RMX450z/RMZ450 Fuel Pump Pressure and Flow Test
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- Опубліковано 4 лис 2023
- After changing the fuel filter in my 2017 RMX450z last month, I was curious as to exactly how my fuel pump was performing. This bike runs good about 95% of the time but can flame out and usually at the wrong time. It can make it a real hand full in tight woods/canyon riding. Flame out in the wrong spot and its abandon ship... Everyone over the side...
The fuel pump tests seem in line with the manual specifications but maybe has a little too much pressure. I've checked the TPS (throttle position sensor) voltage and it was set to the manual spec. I might need to double check those settings again. I know low pressure can cause poor motor running but didn't see anything in the manual diagnostic section about slightly high fuel pressure.
Feel free to comment.
Part 2 : Constant Fuel flow with throttle check plus FI diagnostic light
• RMX450z/RMZ450 Fuel Pu...
Fuel Pump filter change :
• 2017 RMX450z/RMZ450 fu...
#rmx450z
#rmz450
#suzuki
#enduro - Авто та транспорт
When solving the flame out issue, please make video about it.
Cheers from Sweden
Test results would be in the 'normal' range. I would attribute the slightly high pressure to the gauge accuracy. You do not have a fueling problem if you are experiencing issues when riding, unless there is an electrical intermittent that stops the power to your fuel pump.
Flameout issue gets worse after a long stretch in tight woods where I can't really clean out the bike with a long straight. It doesnt overheat but seems to run a little hotter in these conditions.
Maby just too lean in the mapping.
I think those ECUs are impossible to remap because they are locked because EPA compliance
Its got a Vortex ECU so it runs well but yeah the stock ECU was crap and too lean once you removed the throttle stop and snorkel from the airbox and added a FMF muffler.
But if it pumps "to much" does that matter ?
Its the injector that are controlling how much and when ?
Too little pressure i think is more of a problem?
It might make the fuel mix too rich. The fuel pump regulator is easy to get to and change. I have changed the fuel pump filter and have a source for those. Still looking for a source for the fuel pump regulator for this Keihin fuel pump. Fuel pump filter change here : ua-cam.com/video/iZTtr04X8w0/v-deo.htmlsi=wIKQQ8ZIgCMzUrnz
Maybe its time for the throttle body and injector to get a good cleaning.
Swap to stock ecu and see if problem clears up
Stock ecu is bad. The stocker has a tune meant for the EPA. Suzuki got fined big time when the RMX came out in 2010 because it had a CARB tune to get a green sticker with a throttle stop, airbox snorkel, and very restrictive muffler, but also had a performance map accessed by adding a dongle. The EPA got pissed and fined Suzuki big time and forced a recall because Suzuki didn't declare this performance map. My stock 2017 ecu was locked off and only has the green sticker tune. You had about 25 hp on a 450. If you pulled these stock restrictions then the engine ran hot and lean. Most rmx riders would buy a Jd Jetting/dobeck piggyback fuel controller to add more fuel to the mix. I ran one of these units for a while till I found a good deal on a vortex ecu.
Oh, never seen this before.
Where did you get that tool?
Ali Express for about $15.
@@burstcasinothank for that I'll be ordering one today
@@burstcasino can the reading be little off because of Made in China?
That's the only bad thing with cheap stuff. Sometimes they are not 100%
@@burstcasinodid the tool come with the connector for direct fit on the pump , or did you need a extra connector to get it on the plastic tube from the pump?
Last question, won't bother you anymore 👍
@@Motoinc Seems it like it had 3 sizes of quick connects but I only used the RMX size. Yes all in one cheap kit.
I dont know how bad flameouts you have.or what you are comparing with ..but it is a 450 4T, they have fleme outs alot compared to a 2S and
I had less flameouts on my carbed '01 KTM 520exc. Just trying to get a handle on all things Fuel Injection.
@@burstcasino 👍